The oranda goldfish has been around for over 400 years, and is a fancy goldfish variety with long flowing fins, slow graceful movement, and what looks like a raspberry on its head.

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The lateral line is often thought to be a mysterious, almost magical feature of fish that gives them some sort of “sixth sense”.  The reality isn’t quite so fortean, but is nonetheless interesting.

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Out of control pond algae looks like thick green pea soup, feels like slime, and smells of stagnation.  Not only is it unpleasant, it is harmful to a pond and its inhabitants.  It uses up too much oxygen for goldfish, wildlife and plants to thrive, and may eventually result in their death.

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The following table sets out the relative merits of glass and acrylic aquariums.

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